124960-56-1Relevant articles and documents
Tannins and Related Compounds. LXXXV. Structures of Novel C-Glycosidic Ellagitannins, Grandinin and Pterocarinins A and B
Nonaka, Gen-ichiro,Ishimaru, Kanji,Azuma, Ryutaro,Ishimatsu, Makoto,Nishioka, Itsuo
, p. 2071 - 2077 (2007/10/02)
The structures of three hydrolyzable tannins, i,e,, grandinin (3) (isolated from various species of Myrtaceae, Fagaceae and Lythraceae), pterocarinin A (4) (from Pterocarya steroptera C.DC. and Eucalyptus viminalis LABILL.) and pterocarinin B (6) (from P. stenoptera), have been established on the basis of chemical and spectroscopic evidence as novel C-glycosidic ellagitannins in which a C5-polyalcohol unit with lyxose-type configuration is linked through a carbon-carbon bond to the C-1 position of the C-glycosyl mioety.Successful biomimetic synthesis of 3 and 4 suggest that the C5-polyalcohol unit is biosynthetically derived from L-ascorbic acid.